Fish-screen.



A. J'. COLLAR.

FISH SCREEN APPLICATION FILED APR.17, 1911,

1,01 1,1 19. v Patented 1615,1911.

To all whom it may concern:

Beit known that I, ADONIRA-M J. COLLAR,-

AnoNmAM J. count, or YREKA', cmroimm;

rrsn-scnnnu.

Specification of Letters Patent.

Patented Dec. 5, 1811.

Application filed April 17, 1911. Serial No.'621,668.

' citizen of the United States, residing at Yreka, inthe county, ofSiskiyou and State of California, have invented new and usefulImprovements in Fish-Screens, of which the following is a specification.

This invention relates to fish screens. 7 The object of the presentinvention is to provide means for the prevention of the escape andtravel of small fish and animals from the head waters, main canals, andthe like, into irrigating ditches or flumes; and

particularly to provide a screen not only effective to prevent themigration 'of fish but, which will also be self-cleaning; and toprovideand; insure that the screen will be sufficiently clean at all timestopermit the free passage ofwater from one sideto the other 'in theflume or ditchl The invention consists of the parts and the constructionand combination of parts,

as hereinafter more fully described and claimed, having reference to theaccompany ing drawings, in whichp Figure 1 is a vertical section showingthe device. .Fig. 2 is a plan view.-

In the present embodiment of'my invention 2 represents a flume, ditch,canal or other condu't-for water. Water is permitted to flow int theconduit 2 from any head or source of, supply, and it frequently happensthat there is some form of life as fish or other animals, which it isdesired to prevent from passing from the conduit 2, for

.the reason that when the water in the canal; or-conduit 2 has beenfinally delivered to its point of distribution the form of animal lifein the water is thus destroyed. It is to pre- 'vent' this destructionthat I provide a foraminous drum 3 of suitable proportions in length-andwidth so as to extend fully across the volume of water flowing into theconduit 2. The'drum 3 may be provided with a perforated or meshed-screensurface, as/i. This surface or material is supported by suitable headsor disks 5, which are attached to the shaftfi, mounted in suitablebearings 7. in the .walls of the'conduit 2.

'The mesh or finenessv of the screen material .4} isi-such'as willcomply with the requirements ofthe law in this regard. It frequentlyoccurs that debris, floatsam, grass and other deleterious material inthe water will accumulate in such quantities upon the screen t as tomateriallyinterfere with the cleansing of the drum 3 is accomplished bymounting a shaft 7 upon suitable bearings a given quantity ofin thewalls of the conduit 2. Upon this shaft 7 and between the walls of theconduit there is mounteda brush or scrubber 8 normally-contacting thesurface 4 of the drum 3. The best effect and maximum efficiency of thescreening apparatus can be accomplished by rotating the screen or'drumconstantly at a suitable speed and'also rotating the scrubber 8 so thatthe ends of thescrubbing device will constantly brushfor scrub thesurface 4.

-Any suitable means may be provided whereby power may be applied todrivethe shaft 7 upon which the brush 8 is provided.

It-is desirable to operate the brush 8 with power derived from thecurrent. flowing through the conduit 2; To that effect, there transverseto the conduit 2, a shaft9 carry? ing suitable wheels or disks 1 0 uponwhich are mounted feathering blades or paddles 11, which are pivotedalong their outer edges, as at 12, to the wheels 10. The inner ends ofthe paddles 11 are free to swing about the points, 12 as pivots, and, asshown is mounted at 'a v suitable position in and in Fig. l, the currentof water is effective on its'blades which are above the 'center of theshaft" 9 to swing the blades with their inner faces adjacent the shaftso that the force of the water upon the blades will turn the wheels andshaft the direction indicatedby the arrow, 1

It may sometimes bedesirableto form a slight recess," as 13,. inthebottom of the conduit 2 so that those blades or paddles 11 which arepassing below the center of the shaft 9 may swing freely and withoutresistance in the area formed by the depres' To enhance the velocity ofthe -wardly and forcibly against the upper blades 11.

vThe shaft 9 is continued through the side of the conduit 2.: Upon theouter end of the shaft 9 is secured a sprocket wheel orvequivalentdevice 15 over which'may run a chain or belt 16, traveling forward toand over 'a simple transmitting wheel 17 securedupon the outer end ofthe shaft 7 By this means power is transmitted from the motor shaft 9 tothe scrubber shaft 7 and from this shaft power may be transmitted by asprocket wheel 18 secured thereon and over which runs a sprocketchain 19traveling on a large sprocket wheel 20 attached to the shaft 6 of thedrum 3.

The direction of rotation of the shafts 6 and 7 is similar, so that theedge of the scrubbing device 8, adjacent tothe for-aminous surface 4moves in an opposite direction to'thescreened surface, thus constantlyscrubs and scours the latter to remove all accumulations, such as clay,silt, moss, weeds and other material detrimental to the successfuloperation of'the screen.

In order to prevent any small fish from passing between the runningjoints necessary where the drum 3 abuts the side walls and runs adjacentto the bottom of the conduit 2, I have'formed upon the bottom of theconduit '2 a projecting ledge or abutment 21, the 'forward'outer face ofwhich is inclined upwardly so as to direct-the current toward thecentral portionof the screen 4. The slight space necessary for clearanceof the drum 3 is covered by a flexible strip or 'member 22 attached tothe apex of the abutment 21 and extending transversely across theconduit and adapted to constantly bear upon the surface 4 so that it isimpossible for small fish or animals to escape .through the necessaryclearance provided.

Similarly .the Vertical running'joints of the ends of the drum'3adjacent to the walls of the conduit 2 are guarded to prevent thepassage of fish by strips 23, of suitable material, normally underconstant engagement with the face of the surface 4. The paddle wheel10is' entirely submerged, as shown,

but the screened drum 3 may project above the upper surface of the waterso as to effectively prevent any fishfrom moving over the drum. Aparticular function of the abutment 21 formed in front of the drum 3 isto prevent the accumulation of waterlogged materiaL-sand, etc., in theangular space below and in front of the drum 3 along the bottom of theconduit. It will be observed that in the present construction the powerwheel, screen-and the brush are alladapted to rotate in the samedirection to facilitate the passage of rubbish over the submerged. wheelwithout damaging it. Access may be had to the depression in which thepower wheel runs by means of a door 25 provided in aside of the conduit2.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is

1. A screen for canals, conduits, flumes, ditches, etc., including acylindrical foraminous drum, bearings for said drum, and an overshotwater wheel mounted in the canal and adapted to rotate said drum.

- 2. A screen for canals, conduits, flumes, ditches, etc., including acylindrical foramiovershot water wheel mounted in the canal,

- v and connections set between said water wheel and the drum wherebythe latter is revolved. 3. A device for water conduits, compris ing acylindrical screen rotatably mounted transverse the conduit, an overshotwater wheel transversely disposed in the conduit andadapted to operatesaid screen, and means for scrubbing the screen.

' 4. A self-cleaning screen for water conduits, comprising a rotaryscreened drum,

power transmitting mechanism connected thereto, a scrubbing deviceadapted to brush against the surface of the drum, and means foractuating said scrubbing device, said means including an over-shot waterwheel within the conduit and driving connections from said wheel to thescrubbing device.

5. The combination with a water conduit, of a cylindrical rotaryscreen,means for revolving said screen, instrumentalities adapted to scrub thesurface of the screen, and devices arranged to cover the running jointsof the screen adjacent the walls and bottom of the conduit.

6. A device for screening water-fiowing through a conduit, comprising arotary screen, a rotary scrubber engaging the surface of the screen,an-over-shot wheel and connections for rotating the screen and scrubber,and flexible packing members placed along the sides and bottom of theconduit and adapted to prevent the passage of fish and deleteriousmaterial through the runningv joints between the screen andthe walls oftheconduit.

7. A device for screening water passing through a conduit, comprising acylindrical screen, a gear connected to said screen, a scrubberengageable with the surface of the screen, a, gear connected to the Intestimony whereof I have hereunto set scrubber and by which powerist-ransmittedmy hand in the presence of two subscribing to theaforesaid gear connected to the screen, witnesses.

and an overshot water wheel submerged-in ADONIRAM J. COLLAR. 5 the waterin the conduit whereby power is Witnesses:

generated to drive the scrubber and the CARRAL. BUSH,

screen. J AS. R. TAPsco'rr.

